Air pump



Patented Apr. '10, 1928 i UNITED mm 0. 101mm um enonqs w; BBAUTIGAI, or rmrtmmi, rm msnvmm.

Qua rm.

Application fled December 1 2, 1923. Serial l lo/$8 0,190.

a I ThlS invention relates to an air pump, and

i an object of the invention is to prov1de;an

air ump or compressor WhlCh 1s comparative y simple in construction, and is adapted for connection with the prlme mover or engine of a motor vehicle to permit thecompressing of air for the purpose of filling tires or other analo ous uses.

Another object 0 this invention 1s to rovide an air pump or compressor as specl ed,

which includes a reciprocatory piston providedwith a lubricant containing chamber in which the lubricant is confi'nedby means of a leather or similar cup, the said cup en-. gaging the inner wall of the-cylinder to facilitate proper lubrication.

Another object of the invention is to i m vide an air pump or com ressor-as spec' ed,

which embodies a novel cm of valve structure gravity operated and which is free from springs and controls the inlet or airnto and exhaust of air from the cylinder of the pump or compressor.

Other objects of the in the following detail d8SOI'1pt1Qp,.an in the accompan g drawings wherein:

" Figure 1-9: vertical section ofthe 1mprov'ed pump or compressor. 1

Figure 2-is a vertical section taken on the line 2-2 of Figure 1, and taken at right a ice to Figure 1.

, ferrmg more particularly to the draw-' ings, the impreved'icompressor includes a cylinder 1 which-may be provided with air.

cooling or radiating ribs 2', if-desired, or which may bepreferably smooth, depending upon. the desires of the person manufacturing the same, or upon the practical conditions to which the compressor is to be crank-case. 3 and it has a crankin.7 connected thereto eccentrically of t e axis of M13, formed on its lower end.

adapted.- i A crank-case 3 is eonnectedto the,

bass drive shaft 5 rotatably carried thereby, which drive-shaft is adapted for connec- 6 is mounted on the drive-shaft 5 within the the disc. The crank-pin 7 isalsoconnected to 'an arm 8 whichfis rotatably supported by the stub shaft 9. g which is connected to the piston lfextends into the crank-case 3through-a'=suitable'- bearing .structur'e-12,"and ithas a trans-- The piston rod 10 versely exten' substantially oval-shaped invention will ap arwardly towards the- P i' meter of the cup .20 g i r n-f tier 1 in the usual manner, by bolts 4, and it The crankpin? .eatends through the slot 1:!

in the link 13 for connecting thepiston 11 to rotation of the disc.

-The crank-case 3 is adapted to be filled with any suitahletyfie-of hard lubricant, and the piston rod 10 is provided with gouged- ,outpockets -16. at spaced points therein,

which are adaptedto pick up limited quantities of lubricant, for the. purpose of. lubricating the bearing surfaces of the piston rod 10 and the'bearing 12.

the disc 6 for reciprocating the piston upon "The "ston .11 is confined on the piston rod--10 y means of a suitable'nut 17 which,

is threaded u pocket 195'in which a quantity of hard lllbllcent is placed; The nut 17 serves as an abutment for theicentral'portionof the leather cup 20. In ,otherwords this nut preventsthe central; rtion'of the leather cup from" sagging. 61ml also serves as anabutend of the piston 11 with its flat face miston, there-being a disc washer 18 within the leather; cup; to

against-the edge of the n e said disc washer being helgi wall of the cylinder 1 An air pocket22 is ilidelrl 1 above the upper limit 'of'movement o t e iston. 11, and a .valve structure 23* isdetac ablyconnected to-thi's air pocket g n the threaded end 18.0f Y

the piston ro and its upper end is ho1-' .lowed out to provide a lubricant containing.

'hold' the leather cup a inst the 'nut and i p en, onthe; piston. rod'-10.'by a cotter pin or-theQlike 21 The] -:.the .inner .to control the inlet ofair into and ex-f jg haust of air from thelc'ylinder.

The valveg'structure 23; includes a bod The body '24 is through a. valve seated opening '26.'witha which'has 'a nipple 25 thereon that threa s- I mto a. suitable openingvjn the cylinder '1. Y

10 I tion with any suitable prime mover. 'A disc provided with an air passageway. 25, w 10h has communication hosev coupling 27 which-isthreaded on one. I

end of the body 26,-andhasa nipple 28 thereon by means of which a uit bl ir" cmducting may-be connected to the air compressor or pump. .Thefldisc valve is gravity seated, and closes on the downward movement of the piston 11 to prevent escape 0 ir from the cylinder 'dure i ing such downward: movement. Duringthe" lie I downward movement of the piston 11 air is sucked or drawn into the cylinder through the intake of the valve structure 23, the disc valve being gravity seated and acted upon by the suctlon caused by the downward movement of the piston 11 to unseat for- -ton 11. the pressure of con'ipressing the air will force the inlet valve 3t) upon its valve seat 36, and prevent the escape of air through the inlet openings 31 and it will force the valve 29 off of its valve seat 26 and permit the escape of the compressed air to the desired location.

While in'the foregoing description the air pump or compressor has been described as applicable for use in connection with motor vehicles, it is tobe understood, that it may be used for any practical or desired purpose, where air under pressure is desire It is, of course, to be understood that theinvention may be constructed in vari- 30 ous other manners and the parts associated in different relations, and therefore, we do not desire to be limited in any manner, except as set forth in the claim hereunto appended.

What we claim is:

In a device as set forth, a reciprocatory piston provided with a hollowed-out cup portion in its upper end with a hard lubri-' cant contained in said cup portion, a piston rod having a reduced threaded end engaging'through said piston, a nut threaded orrthe reduced end, a semi-flexible lubricant absorbing disc cup engaged with the peripheral edge of the piston and with ,the nut constituting a closure for the cup ibrtion to permit gradual feeding of the lubricant from the cup, a disc washer within the disc cup to hold the lubricant absorbing disc cup against the nut and in contact with the edge of the piston, and a cotter pin to retain the disc washer in position."

In testimony whereof we afiix our. signatures.

ELWIN O. KOENIG. GEORGE W. BRAUTIGAM. 

